Roof Slope Conversion Table

Example slope as grade.

Roof slope conversion table.

The combination of two numbers are used to display or show the roof pitch. Finding the best roof slope conversion chart. On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length. Other than the 45 roof slope which is 12 in 12 none of the standard roof pitches 5 in 12 6 in 12 etc are equal to a whole degree.

Slope as grade for an elevation of 1 m over a distance of 2 m can be calculated as. Using a tape measure make a pencil mark 12 inches from the end of a carpenter s level. The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72. To obtain an accurate roof pitch measurement properly measure the rise and run.

Roof pitch is the slope created by the rafter. The table below shows common roof pitches and the equivalent grade degrees and radians for each. A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof. Finding the calculations needed to take things a step further with the roof conversion or development is going to take a lot of time and you need to have access to the best charts and software possible.

Then you ll be able to measure slope from an unfinished attic space under the roof. S grade 1 m 2 m 50 slope and roof pitch.